In-memory storage driver (testing only)

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For purely tests purposes, you can use the inmemory storage driver. This
driver is an implementation of the storagedriver.StorageDriver interface which
uses local memory for object storage. If you would like to run a registry from
volatile memory, use the filesystem driver on a ramdisk.

IMPORTANT: This storage driver does not persist data across runs. This is why it is only suitable for testing. Never use this driver in production.